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What happen to the shape of the earthworm when the circular muscles contract?

The segments elongate when the circular muscles contract.


How does the respiratory system expand and contract?

Thoracic muscles & the diaphragm change the shape of the chest.


How are muscles especially adapted for their function?

They have elasticity so they can lengthen, they have flexibility so they can regain their original shape, excitability so they can be made to contract, and they have contract bility so they can contract.


Are the ciliary muscles considered voluntary skeletal muscles?

No, the ciliary muscles are not considered voluntary skeletal muscles. They are involuntary smooth muscles that control the shape of the lens in the eye.


What are all of the skeletal muscles in the body?

Muscles are set kind off like sets. Muscles can only contract and relax. It takes at least two muscles to move a part of the body fully. For example, when your arm is straight, your triceps (back of your arm) contract and the bicep relaxes. When your move your arm to a l shape, the bicep contacts and the tri relaxes. This happens through out the whole body.


How do muscles change shape when you use them?

they do not change shapes,whenthey relax and contract we feel and see then moving.


Are there bones tissue that can relax and contract.?

Bones themselves do not relax and contract; they are rigid structures that provide support and shape to the body. However, muscles attached to bones are responsible for movement and can contract and relax. When muscles contract, they pull on bones, facilitating movement of the skeletal system. This interaction between muscles and bones allows for various movements and functions in the body.


What does the cilliary muscles do?

The Cillary Muscles are basically muscles inside your eye that stretch and change shape to get the perfect image to your brain


Do bones contract?

No, bones do not contract. Muscles contract and bones provide structure and support for the body. However, bones can change shape over time due to factors like growth, healing, and degenerative conditions.


What do muscles do list two different functions of muscles?

Some muscles (skeletal muscles) will not contract unless stimulated by neurons; other muscles (smooth & cardiac) will contract without nervous stimulation but their contraction can be influenced by the nervous system. Thus, the nervous and muscle systems are closely interconnected.


Why muscles have definite shape?

It's all about movement and flexibility.Each muscle is developed for a chore so it has a definite shape wich is perfect for that thing.For example the leg muscles, to move the leg one muscle must contract while the other relaxes.


How does the ciliary muscles work to focus an image of a close object?

The ciliary muscles contract to shape the lens in the eye, making it rounder and thicker. This change in lens shape enhances its refractive power, allowing the eye to bring near objects into focus.